package main 

import (
	"fmt"
	"os"
)
// go run echo1.go 1 2 3 4
func main() {
	var s,sep string

	for i:=1; i < len(os.Args);i++ {
		s += sep + os.Args[i]
		sep = " "
	}
	fmt.Println("输入参数为：")
	fmt.Println(s)
	
}